20151920

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2311}}^1$

素因数の和:2433

約数の個数: 40

約数和(自身を含む): 47303520

約数和(自身を除く): 27151600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 2311, 4360, 4622, 8720, 9244, 11555, 18488, 23110, 36976, 46220, 92440, 184880, 251899, 503798, 1007596, 1259495, 2015192, 2518990, 4030384, 5037980, 10075960, 20151920]

約数ペア:

[(1, 20151920), (2, 10075960), (4, 5037980), (5, 4030384), (8, 2518990), (10, 2015192), (16, 1259495), (20, 1007596), (40, 503798), (80, 251899), (109, 184880), (218, 92440), (436, 46220), (545, 36976), (872, 23110), (1090, 18488), (1744, 11555), (2180, 9244), (2311, 8720), (4360, 4622)]